Issue |
MATEC Web Conf.
Volume 282, 2019
4th Central European Symposium on Building Physics (CESBP 2019)
|
|
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Article Number | 02035 | |
Number of page(s) | 6 | |
Section | Regular Papers | |
DOI | https://doi.org/10.1051/matecconf/201928202035 | |
Published online | 06 September 2019 |
Centrifuge experiments for the determination of the moisture storage and transport properties in the overhygroscopic range
KU Leuven, Building Physics Section, Kasteelpark Arenberg 40, 3001 Leuven, Belgium
* Corresponding author: Evy.Vereecken@kuleuven.be
This study explores the potential of a centrifuge experiment for hygric property determination. In this method, a core sample is placed in a tube which is spun at different rotational speeds to create a distribution of moisture contents and capillary pressures. This way, a simultaneous determination of the moisture retention curve and moisture permeability curve is possible. Measurements performed in the petroleum industry and in soil science already showed the technique to be an appropriate substitute for the pressure plate method. In building physics, the potential of the centrifuge method is currently still unexplored. Therefore, in this study, preliminary desorption measurements on brick samples are performed. To infer the moisture retention curve, an approximate data analysis method is applied. This approach is compared to a more sophisticated parameter estimation technique, which is also used to infer the moisture permeability curve. From a theoretical point of view, the centrifuge method allows a simultaneous determination of the moisture storage and transport properties of building materials. In practice, however, experimental inaccuracies make the experimental results unusable for a reliable determination of the moisture transport properties.
© The Authors, published by EDP Sciences, 2019
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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